a $0 like in perl

yargs · Oct 13, 2010 · e688370 · e688370
1 parent e9d39a5
commit e688370
Showing 1 changed file with 6 additions and 8 deletions.
diff --git a/lib/optimist.js b/lib/optimist.js
@@ -76,18 +76,16 @@ function Argv (args) {
     };
 
     function fail (msg) {
-        if (usage) console.error(
-            // not very robust:
-            usage.replace(/\$0/g,
-                process.env._.match(/(^|\/)(node|env)$/)
-                ? process.argv.slice(0,2).join(' ')
-                : process.env._
-            )
-        );
+        if (usage) console.error(usage.replace(/\$0/g, self.$0))
         console.error(msg);
         process.exit();
     }
 
+    self.$0 = process.env._.match(/(^|\/)(node|env)$/)
+        ? process.argv.slice(0,2).join(' ')
+        : process.env._
+    ;
+
     self.check = function (f) {
         try {
             if (f(self.argv) === false) fail(err);